"She just made us laugh the entire time," Brittany told EOnline.com. "And basically everything she does in the movie is improvised. She'd just go on these tangents for 20 minutes, and we'd just stand there in awe because she never stopped. So about only one-tenth of what she actually did wound up in the movie. Hopefully they'll put [the rest] on the blooper reel."

Pia Toscano, Rebecca Black, Skylar Astin, Anna Camp and Tyler Posey also showed up for the L.A. premiere last night.